Temperature phased anaerobic digestion (TPAD) of organic fraction of municipal solid waste (OFMSW) and digested sludge (DS): Effect of different hydrolysis conditions

Hydrolysis is the most critical stage in high solids Temperature Phased Anaerobic Digestion (TPAD). In this paper two different Organic Fraction of Municipal Solid Waste (OFMSW) types were tested co-digestion with Digested Sludge (DS) at temperatures: 37, 55 and 65 °C. Volatile fatty acids (VFAs), soluble chemical oxygen demand (CODs) Biochemical Methane Production (BMP) measured calculated after 0, 24, 48 72 h hydrolysis. The results showed that both BMP methane production rate improved. A Solids Retention Time (SRT) a temperature °C gave best results: reaction constant k was 0.34 d-1 250 mLCH4/gMV, which 47% 19% higher compared to reference (0 hydrolysis). CODs VFAs profiles during hydrolysis how OFMSW initial characteristics can affect performance phased anaerobic digestion.